Subthrottle Sensor (Service Code 32)
Measure the output voltage with the engine stopped with
the connector joined.
Turn the ignition switch on.
Measure the output voltage when the subthrottle valves
are fully opened by hand.
Standard: DC 1.08 ∼ 1.12 V at subthrottle valve full
DC 4.48 ∼ 4.52 V at subthrottle valve full
open position (for reference)
Open the subthrottle valves, confirm the output voltage
will be raise.
The standard voltage refers to the value when the volt-
age reading at the Input Voltage Inspection shows 5 V
When the input voltage reading shows other than 5 V,
derive a voltage range as follows.
In the case of a input voltage of 4.75 V.
1.08 × 4.75 ÷ 5.00 = 1.026 V
1.12 × 4.75 ÷ 5.00 = 1.064 V
Thus, the valid range is 1.026
Turn the ignition switch off.
If the reading is out of the standard, check the subthrot-
tle sensor resistance (see Subthrottle Sensor Resistance
If the reading is within the standard, remove the ECU and
check the wiring for continuity between harness connec-
Special Tool - Hand Tester: 57001-1394
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→
Subthrottle Sensor Connector [B]
BL/W lead (ECU terminal 28) [C]
G lead (ECU terminal 49) [D]
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection in the
Fuel System (DFI) chapter).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation in the Fuel System (DFI)
SELF-DIAGNOSIS SYSTEM 17-51